State profile · Near national median SD

Illinois bridge safety

Condition ratings, load ratings, and structural-deficiency data for every public highway bridge in Illinois — drawn straight from the FHWA National Bridge Inventory.

27,743
Public bridges
41.2%
Good condition
7.9%
Poor condition
7.9%
Structurally deficient

Total Bridges

27,743

Public highway bridges in Illinois

Good Condition

41.2%

11,426 bridges rated 7-9

-8.8pp vs 50% benchmark

Poor Condition

7.9%

2,186 bridges rated 0-4

Structurally Deficient

7.9%

2,186 bridges flagged for repair priority

0.9pp vs national avg 7.0%

Illinois vs national bridge condition

Illinois — Good condition share 41.2%
National avg

Share of bridges rated 7-9 on the FHWA 0-9 scale (deck, superstructure, substructure all good).

Illinois — Structurally deficient share 26.3%
National avg

Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.0%.

Condition Distribution

Bridge inventory deck-condition mix — Illinois (FHWA NBI)

Illinois41.185163825109036%36.47046101719353%7.879465090293047%7.879465090293047%GoodFairPoorStructurally Deficient
Bridge inventory deck-condition mix — Illinois (FHWA NBI)

Counties (102)

Adams 325 Alexander 96 Bond 165 Boone 111 Brown 71 Bureau 382 Calhoun 81 Carroll 185 Cass 77 Champaign 743 Christian 323 Clark 232 Clay 171 Clinton 187 Coles 308 Cook 2185 Crawford 196 Cumberland 169 De Witt 197 DeKalb 264 Douglas 234 DuPage 380 Edgar 278 Edwards 79 Effingham 260 Fayette 356 Ford 300 Franklin 323 Fulton 210 Gallatin 82 Greene 166 Grundy 269 Hamilton 164 Hancock 291 Hardin 58 Henderson 144 Henry 331 Iroquois 565 Jackson 235 Jasper 180 Jefferson 270 Jersey 111 Jo Daviess 198 Johnson 120 Kane 354 Kankakee 352 Kendall 133 Knox 321 LaSalle 529 Lake 286 Lawrence 183 Lee 372 Livingston 578 Logan 296 Macon 368 Macoupin 248 Madison 543 Marion 301 Marshall 153 Mason 85 Massac 138 McDonough 210 McHenry 229 McLean 624 Menard 90 Mercer 162 Monroe 130 Montgomery 261 Morgan 241 Moultrie 171 Ogle 377 Peoria 365 Perry 139 Piatt 249 Pike 338 Pope 86 Pulaski 106 Putnam 50 Randolph 155 Richland 147 Rock Island 256 Saline 176 Sangamon 480 Schuyler 121 Scott 96 Shelby 330 St. Clair 502 Stark 89 Stephenson 332 Tazewell 361 Union 192 Vermilion 515 Wabash 88 Warren 202 Washington 232 Wayne 264 White 210 Whiteside 280 Will 674 Williamson 204 Winnebago 475 Woodford 222

Illinois vs nearby ranks

Adjacent states on the structurally deficient leaderboard (lower share = better)

States are ranked by share of bridges flagged structurally deficient — the FHWA classification for any span where deck, superstructure, or substructure carries a condition rating of 4 or below. Lower percentages indicate stronger maintenance funding and inspection follow-through. States here sit immediately above and below Illinois on the same metric.

44

Rhode Island

7.69% top marginal rate
Structure
Progressive
Burden @ $100K
$78

31

Nebraska

7.73% top marginal rate
Structure
Progressive
Burden @ $100K
$15,571
Selected

17

Illinois

7.88% top marginal rate
Structure
Progressive
Burden @ $100K
$27,743

25

Massachusetts

7.96% top marginal rate
Structure
Progressive
Burden @ $100K
$5,314

29

Missouri

8.53% top marginal rate
Structure
Progressive
Burden @ $100K
$24,654

Bridges Needing Most Attention in Illinois

Six lowest-condition bridges in Illinois, ranked by composite NBI rating. Each is inspected at least every 24 months.

FAS 1599

Poor

Over: DRAINAGE CANAL

2.2 MI E MEYER, Adams, IL

Built 1980 Load: 0.6 t ADT: 200

CH 15

Poor

Over: E FK MAZONRIVER

0.05 MI W CH 16, Grundy, IL

Built 1977 Load: 1.0 t ADT: 1,400

MOOSE RD - TR 240

Structurally Deficient

Over: WILSON CREEK

NE-35-T3NR2E, Fulton, IL

Built 1935 Load: 1.3 t ADT: 10

TR 10-B

Structurally Deficient

Over: KING CREEK

W EDGE OF MINERAL, Bureau, IL

Built 1899 Load: 1.6 t ADT: 10

TR-6

Structurally Deficient

Over: DRAINAGE DITCH

3.5 MI NE DIETERICH, Effingham, IL

Built 1909 Load: 1.6 t ADT: 25

TR208K(TWIN BRIDGE

Structurally Deficient

Over: BIG CREEK

NE EDGE MT ZION, Macon, IL

Built 1967 Load: 1.9 t ADT: 375

All Bridges in Illinois

WABASH BIKE TRAIL

Unknown

Over: IL 4 (VETERANS PKWY)

1M N I-72, Sangamon, IL

Built 1973 ADT: 32,600

VETERANS / IL 4 (S

Unknown

Over: I-72 / US 36

VETERANS I-72 INTCHG, Sangamon, IL

Built 1973 ADT: 36,400

VETERANS / IL 4 (N

Unknown

Over: I-72 / US 36

VETERANS I-72 INTCHG, Sangamon, IL

Built 1973 ADT: 36,400

JIMTOWN RD (TR 18)

Unknown

Over: I-72 / US 36

.75M W NEW BERLN INT, Sangamon, IL

Built 1974 ADT: 14,500

WAVERLY RD (CH 10)

Unknown

Over: I-72 / US 36

NEW BERLIN INTERCHNG, Sangamon, IL

Built 1974 ADT: 17,100

LINK ROAD

Unknown

Over: I-72 / US 36

1.2M E NEW BERLIN IN, Sangamon, IL

Built 1974 ADT: 17,100

TOLLIVER/BATES RD

Unknown

Over: I-72 / US 36

5.5M W WABASH INTCHG, Sangamon, IL

Built 1974 ADT: 17,100

FARMINGDALE RD/CH

Unknown

Over: I-72 / US 36

2.6M W WABASH INTCHG, Sangamon, IL

Built 1974 ADT: 17,100

CURRAN RD (TR 156)

Unknown

Over: I- 72 / US 36

1.1M W WABASH INTCHG, Sangamon, IL

Built 1974 ADT: 17,100

UNION PACIFIC RR

Unknown

Over: I-72 / US 36

.56M W WABASH INTCHG, Sangamon, IL

Built 1975 ADT: 17,100

I-72 / US 36 (WB)

Unknown

Over: WABASH AVE (OLD 36)

2.6M W IL4/VETERANS, Sangamon, IL

Built 1974 ADT: 9,800

I-72 / US 36 (EB)

Unknown

Over: WABASH AVE (OLD 36)

2.6M W IL4/VETERANS, Sangamon, IL

Built 1974 ADT: 8,000

OAK CREST RD/ TR 1

Unknown

Over: I-72

2.9M E I-55, Sangamon, IL

Built 1974 ADT: 14,500

OVERPASS RD / TR 4

Unknown

Over: I-72 / US 36

1.4M E SANGAMON R., Sangamon, IL

Built 1974 ADT: 14,500

DAWSON RD / CH 16

Unknown

Over: I-72 / US 36

4.5M E SANGAMON R., Sangamon, IL

Built 1975 ADT: 14,500

BUFFALO-MCHBG/ CH

Unknown

Over: I-72 / US 36

1M S BUFFALO, Sangamon, IL

Built 1974 ADT: 14,300

LANESVILLE RD/ CH

Unknown

Over: I-72 / US 36

3M E BUFFALO INTCHG, Sangamon, IL

Built 1975 ADT: 14,300

KENT FARM RD/ TR 5

Unknown

Over: I-72 / US 36

3M W ILLIOPOLIS INT., Sangamon, IL

Built 1974 ADT: 14,300

CANTRELL RD/ FAS 6

Unknown

Over: I-72 / US 36

1M W ILLIOPOLIS INT., Sangamon, IL

Built 1974 ADT: 14,300

S DYE RD / CH 33

Unknown

Over: I-72 / US 36

ILLIOPOLIS INTERCHG, Sangamon, IL

Built 1974 ADT: 14,300

IL 123 / CH 2

Unknown

Over: I-55

WILLIAMSVILLE INTCHG, Sangamon, IL

Built 1974 ADT: 32,400

CLEARLAKE AV/IL29&

Unknown

Over: IC(I&M)RR / 19TH ST.

.72M E 9TH ST (BL55), Sangamon, IL

Built 1985 ADT: 275

MADISON ST / IL 97

Unknown

Over: WALNUT STREET

1BL N JEFFERSON ST., Sangamon, IL

Built 1993 ADT: 10,200

CHATHAM ROAD

Unknown

Over: I-72/US 36/NS RR

1.5M S WABASH AV, Sangamon, IL

Built 1991 ADT: 36,400

MADISON ST/IL 97(E

Unknown

Over: JEFFERSON /IL 97(WB)

.7M W WALNUT/IL 29, Sangamon, IL

Built 1994 ADT: 11,600

MACARTHUR BLVD

Unknown

Over: FAI 72

1.5 MI W I-55, Sangamon, IL

Built 2009 ADT: 40,900

CAMP BUTLER RD.

Unknown

Over: OLD 36 (WB)

1.7M E IL 54, Sangamon, IL

Built 2006 ADT: 2,500

Pedestrian Bridge

Unknown

Over: Clear Lake Av

0.28 mi E 11th St, Sangamon, IL

Built 1990 ADT: 17,000

INTERURBAN BIKE TR

Unknown

Over: PLUMMER BLVD

CHATHAM, Sangamon, IL

Built 2002 ADT: 5,700

ILLINOIS CENTRAL R

Unknown

Over: 6TH ST / BL 55

S 6TH&STANFORD-SPFLD, Sangamon, IL

Built 1949 ADT: 15,100

UNION PACIFIC RR

Unknown

Over: 9TH ST. / BL 55

1500 N 9TH - SPFLD, Sangamon, IL

Built 1900 ADT: 9,450

UNION PACIFIC RR

Unknown

Over: CAPITOL AVE

BETWEEN 3RD & 4TH ST, Sangamon, IL

Built 1903 ADT: 2,200

UNION PACIFIC RR

Unknown

Over: OLD US 36

.5M W CH 18 - CURRAN, Sangamon, IL

Built 1900 ADT: 4,000

BURLINGTON NORTH.

Unknown

Over: IL 104 (FAP 753)

3M E WAVERLY(E CH10), Sangamon, IL

Built 1913 ADT: 2,350

UNION PACIFIC RR

Unknown

Over: DIRKSEN PKWY/FAP 668

.2M E PEORIA RD/BL55, Sangamon, IL

Built 1939 ADT: 13,200

SANGAMON VALLEY TR

Unknown

Over: OLD JACK RD/FAS 613

1.3M W VETERANS PKWY, Sangamon, IL

Built 1900 ADT: 9,000

B&N RR

Unknown

Over: FAS 621

P M S NEW BERLIN, Sangamon, IL

Built 1900 ADT: 1,250

ILLINOIS MIDLAND R

Unknown

Over: SANGAMON AV /FAP 667

2BL E PEORIA RD (W), Sangamon, IL

Built 1900 ADT: 14,600

UNION PACIFIC

Unknown

Over: SANGAMON AV /FAP 667

2BL E PEORIA RD (E), Sangamon, IL

Built 1900 ADT: 14,600

IC&G RR

Unknown

Over: TR 110

3 M NE LOAMI, Sangamon, IL

Built 1906 ADT: 175

C&NW RR

Unknown

Over: TR 164

1.8 M S CURRAN, Sangamon, IL

Built 1900 ADT: 250

UP RR

Unknown

Over: COCKRELL LN

SW OF SPFLD, Sangamon, IL

Built 1900 ADT: 3,900

IC&G RR

Unknown

Over: TR 464

1 MI E BARCLAY, Sangamon, IL

Built 1900 ADT: 100

ILLINOIS CENTRAL R

Unknown

Over: 4TH STREET

.36M S ILES - SPFLD, Sangamon, IL

Built 1900 ADT: 4,100

SANGAMON VALLEY TR

Unknown

Over: IL 97/JEFFERSON ST

.5M W IL4/VET. PKWY, Sangamon, IL

Built 1917 ADT: 8,500

IC&G RR

Unknown

Over: FAU-8054 HAZEL DELL

.32MI-W-OF-MILAN DR., Sangamon, IL

Built 1925 ADT: 4,100

NORFOLK SOUTHERN R

Unknown

Over: COOK ST. / FAU 7985

1BL E 9TH ST - SPFLD, Sangamon, IL

Built 1988 ADT: 6,500

ILLINOIS&MIDLAND R

Unknown

Over: PEORIA RD / BL 55

.06M W VETERANS PKWY, Sangamon, IL

Built 1995 ADT: 15,400

UNION PACIFIC RR

Unknown

Over: DODGE ST. (FAU 7973)

BETW 3RD ST & 4TH ST, Sangamon, IL

Built 1903 ADT: 550

UPRR

Unknown

Over: PLUMMER BLVD

1.1MI E IL 4/CHATHAM, Sangamon, IL

Built 2000 ADT: 5,700

Showing 3,301-3,350 of 27,743 bridges

Related

All states → | National rankings → | Understanding conditions → | SD bridges explained →
Data sourced from the FHWA National Bridge Inventory (NBI), latest released cycle. See our methodology for details. Retrieved and formatted by PlainBridges Editorial.

Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the FHWA National Bridge Inventory (NBI). A "structurally deficient" rating is a repair-priority signal, not a closure or unsafe-to-cross designation. Consult a qualified civil engineer before making decisions based on this data.

Understanding Bridge Conditions

How FHWA rates bridge condition on a 0-9 scale.

Check Your Daily Bridges

How to look up bridge condition data for bridges on your route.

Read our methodology — how this data is sourced, computed, and verified.